soil conservation and control of erosion is a basic problem in all countries. the goal of this research is to estimate erosion and sediment yield in ekbatan dam drainage basin by erosion potential method (epm), using geographic information system (gis). the basin is located in hamedan province, west of iran, in a cold and semi- arid region, with an average annual rainfall of 334mm. the study ar...

The nature conservation units (UC) are specially protected territorial spaces (ETEP), with creation, implementation and management provided for by Law 9985/2000, which established the National System of Conservation Units (SNUC). Over 28% Brazilian territory is set aside conservation, in a universe over 2,300 Units. Paraiba, Northeast region, has 15 (fifteen) Protected Units, representing less ...

OBJECTIVE To assess the effectiveness of two mechanical methods of blood conservation in reducing the need for allogeneic red blood cells or coagulation products during cardiac surgery. DESIGN Randomised controlled trial. SETTING Regional cardiac centre in a teaching hospital in Southampton. PARTICIPANTS 263 adults aged 18-80 years undergoing elective coronary artery bypass surgery entere...

Introduction The detection of a new species is the result of a decision-making process, one that has traditionally and primarily been based upon the discovery of distinguishing characters (Cronquist 1978;Mayr 1982;Winston 1999; Sites &Marshall 2004). This process, called diagnosis, is acutely important as it necessarily lies at the crux of the discovery of biodiversity, including the identifica...

Roberge, J.-M. 2006. Umbrella species as a conservation planning tool: an assessment using resident birds in hemiboreal and boreal forests. Doctor’s dissertation. ISSN 1652-6880, ISBN 91-576-7133-8. In northern Europe, a long history of anthropogenic land use has led to profound changes within forest ecosystems. One of the proposed approaches for conservation and restoration of forest biodivers...